Izroth was never the type to seek a confrontation willingly, however, he would not allow himself to be treated unfairly, especially if Orion wanted to intimidate him.
Orion had cut Izroth off before he even had a chance to explain himself and Kaz simply washed his hands of the problem even after Izroth had already explained to him that it was a misunderstanding.
While the books were scattered all around, there were not nearly enough tables in the library to hold all two thousand books unless they were stacked up all the way to the ceiling. Even though it may have looked disorganized at first glance to those viewing from an outside perspective, Izroth actually had the books neatly stacked into organized piles.